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Monolithic polytrifluorochloroethylene bipolar membrane containing metal phthalocyanine derivative water dissociation catalyst and preparation method of monolithic polytrifluorochloroethylene bipolar membrane

A technology of polychlorotrifluoroethylene and metal phthalocyanine, which is applied in chemical instruments and methods, ion exchange, anion exchange, etc., can solve the problems of reducing the service life of bipolar membranes and easy peeling, and achieves low transmembrane voltage and low transmembrane voltage. The effect of drain and low resistance

Pending Publication Date: 2022-06-21
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, because the existing bipolar membrane is composed of anion exchange membrane, cation exchange membrane and intermediate catalytic layer, the difference in physical and chemical properties between different layers makes it easy to peel off during use, thereby reducing the bipolar Membrane service life

Method used

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  • Monolithic polytrifluorochloroethylene bipolar membrane containing metal phthalocyanine derivative water dissociation catalyst and preparation method of monolithic polytrifluorochloroethylene bipolar membrane
  • Monolithic polytrifluorochloroethylene bipolar membrane containing metal phthalocyanine derivative water dissociation catalyst and preparation method of monolithic polytrifluorochloroethylene bipolar membrane
  • Monolithic polytrifluorochloroethylene bipolar membrane containing metal phthalocyanine derivative water dissociation catalyst and preparation method of monolithic polytrifluorochloroethylene bipolar membrane

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Experimental program
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Effect test

Embodiment 1

[0037] A monolithic polychlorotrifluoroethylene bipolar membrane containing a metal phthalocyanine derivative hydrolysis catalyst, wherein a sulfonic acid group is introduced into one side of the bipolar membrane, and a quaternary ammonium group is introduced into the other side; the cation exchange membrane in the bipolar membrane The structural formula is:

[0038]

[0039] The structural formula of the anion exchange membrane is:

[0040]

[0041] The structural formula of the catalyst between the intermediate interfaces is:

[0042]

[0043] Wherein, n is the degree of polymerization of the main chain of the polytrifluorochloro-vinyl film, m is the degree of polymerization of the side chains of polybromomethylstyrene, and n and m are integers other than zero.

Embodiment 2

[0045]A monolithic polychlorotrifluoroethylene bipolar membrane containing a metal phthalocyanine derivative water dissociation catalyst, comprising the following steps:

[0046] S1. Preparation of polychlorotrifluoroethylene grafted polymethylstyrene copolymer (PCTFE-g-PMSt): weigh 20 g of polychlorotrifluoroethylene and dissolve it in 200 mL of N-methylpyrrolidone, pass nitrogen to remove oxygen, and heat up to After 110°C, 144.1g of 4-methylstyrene, 8.72g of CuBr and 9.52g of bipyridine were added to the reaction system. Under the protection of nitrogen, the reaction solution was poured into alcohol water with a volume ratio of 1:1 after constant temperature reaction for 40h. In the mixed solvent, the graft conjugate was obtained by precipitation; the precipitate was rinsed with alcohol water for several times and then soaked in running water for 24 hours to remove copper ions and bipyridine, filter and dry, and put the precipitate into a Soxhlet extractor Extracted with to...

Embodiment 3

[0055] A preparation method of a monolithic polychlorotrifluoroethylene bipolar membrane containing a metal phthalocyanine derivative water dissociation catalyst, comprising the following steps:

[0056] S1. Preparation of polychlorotrifluoroethylene grafted polymethylstyrene copolymer (PCTFE-g-PMSt): Weigh 20 g of polychlorotrifluoroethylene and dissolve it in 200 mL of dimethyl sulfoxide, pass nitrogen to remove oxygen, and heat up to 110 After ℃, 180.1g of 2-methylstyrene, 8.72g of CuBr and 21.13g of pentamethyldiethylenetriamine were added to the reaction system, and under nitrogen protection, the reaction solution was poured into a volume ratio of 1:1 after constant temperature reaction for 5h. In the mixed solvent of alcohol and water, the graft conjugate was precipitated; the precipitate was rinsed with alcohol water for several times and then soaked in running water for 24 hours to remove copper ions and pentamethyldiethylenetriamine, filtered and dried, and the precipi...

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Abstract

The invention discloses a monolithic polytrifluorochloroethylene bipolar membrane containing a metal phthalocyanine derivative hydrolysis catalyst and a preparation method of the monolithic polytrifluorochloroethylene bipolar membrane, and belongs to the field of electrically driven membranes. An anion exchange group is introduced to the other side of the bipolar membrane to prepare a monolithic bipolar membrane, the use of a cancerogen chloromethyl ether is avoided, meanwhile, a metal phthalocyanine derivative is bonded on a polytrifluorochloroethylene side chain by utilizing the reaction of bromomethyl and amino phthalocyanine to serve as a hydrolysis catalyst of a middle layer of the bipolar membrane, and the prepared bipolar membrane is low in resistance, low in transmembrane voltage and high in reliability. And the catalyst in the middle layer is not easy to run off, has long service life, and does not have the problems of bubbling, cracking and the like.

Description

technical field [0001] The invention relates to a monolithic polychlorotrifluoroethylene bipolar membrane containing a metal phthalocyanine derivative water dissociation catalyst and a preparation method thereof, belonging to the technical field of electrically driven membranes. Background technique [0002] Bipolar membrane is a composite membrane material composed of anion exchange membrane, cation exchange membrane and intermediate catalytic layer. Under the action of the electric field, the water molecules in the middle layer of the bipolar membrane are dissociated to generate hydrogen ions and hydroxide radicals, so as to achieve the purpose of producing acid and alkali. The theoretical potential of bipolar membrane water dissociation to produce acid and base is 0.828V, and the theoretical potential of electrolysis of water to produce acid and base is 2.057V. In addition, the water dissociation rate in the interlayer of the bipolar membrane is about 50 million times fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/20B01J41/14
CPCB01J39/20B01J41/14
Inventor 陈晓黄雪红金延超陈日耀林思涵
Owner FUJIAN NORMAL UNIV
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